Improvement in core-boxes



Patented July s, 1877.

CORE-BOX.

W. A'IKIN a, W. w. DRUMMOND.

vregv..A

WILLIAM AIKIN AND WILLIAM W. DRUMMOND, OF LOUISVILLE, KENTUCKY.

IMPRQVEVIENT IN CORE-BOXES.

Specification forming part of Letters Patent No. 92,556, dated July 3, 1877; application filed April 28, 1877. i

To all whom it may concern:

Be it known that we, WiLLIAM AIKIN and WILLIAM W. DRUMMOND, of Louisville, in the county of J eiferson and State of Kentucky, have invented a new and useful Improvement in Core-Boxes, of which the following is a specification The object of this invention is the formation of cores for casting by compression, thereby saving the comparatively costly process of making them by ramming the sand confined in a core-box.

In the annexed drawing, making a part of this specification, Figure l is a transverse section. Fig. 2 is a vertical section. i

The same letters are employed in both gures in the indication of identical parts.

A A are 'the stationary sides of the coreboX, fastened by strong frames to hold them rmly in place. On the sides are the two semicircular braces B B', which inclose the eccentrics U C1, actuated by the levers C2. On one side the eccentrics bear against the A braces B B', and on the other against the sliding rams D D', which ll the space between the edges of the sides A A', and are cut into Segments 011 their inner faces, corresponding to those cut in the sides, so that the four faces, when the plungers are forced in, shall form a complete circle.

The operation is as follows: The sand having been prepared in the ordinary manner, and the core barrels or rods, if such are used,

being placed in position in the press, the sand is thrown in to ll the space between the parts A A' D u1D', in relative position, as shown in Fig. l, and then the levers C2 are depressed, forcing the plungers D D toward one another, compressing the sand until it is brought to its proper cylindrical or other form. Instead of eccentrics, levers or any other suitable de vice may be used in forcing the plungers together.

Instead of having the sides absolutely stationary, as shown, they may be iliade in sections, joined in the middle on one side by hinges, so that the core-box may be spread by swinging the sections on the hinges.

W'e'illustrated our case as adapted for making plain cylindrical cores, but we do not limit our claims to any particular form.

What we claim as our invention, and de sire to secure by Letters Patent, is-

In acore-box, the combination of the recessed side pieces A A', the intermediate plungers D D', forming the core between the four parts, and the eccentrics C G1, for compressing the core, substantially as set forth.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

WILLIAM AIKIN. WM. NV. DRUMMOND. 4Witnesses:

E. THOMPSON, W. T. DRUMMOND. 

